Landscaping issue

I’m sure this has been reported to blizzard thousands of times, but it seems to me as if landscaping has a issue which makes the treants pictures just white

Yes, it has indeed. It is in fact even included in the “known issues” topic at the top of this forum’s screen: Known Issues List 2019 - Updated Dec 12th - #6 by Aelathera
(listed under April 3).

We appreciate the effort to report a bug here, but we would appreciate it even more if you look through the known issues list first. Thanks!